“What do you get when you eat bad pizza?”/“Pizzarrhea.”

A “pizzeria” is a pizza restaurant. “Pizzarrhea” (pizza + diarrhea) is a jocular portmanteau word about getting “pizza shits.”
 
“What do you get when you eat a prune pizza? Pizzarrhea!” was printed in a 2007 book. “Pizzarrhea” was entered in the Urban Dictionary on August 17, 2007.
 
     
Google Books
The Everything Kids’ Gross Cookbook:
Get Your Hands Dirty in the Kitchen with These Yucky Meals
By Colleen Sell and Melinda Sell Frank
New York, NY: Simon & Schuster
2007
Pg. ?:
What do you get when you eat a prune pizza?
Pizzarrhea!
 
Urban Dictionary
pizzarrhea
specifically:
the sickness which results from eating a pizza from one of those grimy corner joints. (note to self: pepperoni is not supposed to be green.) usually accompanied by several hours of toilet hovering.
generally:
a similar sickness which occurs after eating anything which is considered unfit for consumption in places other than sri lanka. aka food poisoning.
(...)
by carlton berry August 17, 2007
 
Twitter
Steve Delfino 🍩‏
@SteveDelfino
I get diarrhea every time I eat pizza. I’d call it pizzarrhea, but that word’s already taken.
5:15 PM - 3 Aug 2009
 
OCLC WorldCat record
Pizzarrhea!.
Author: Pizzarrhea (Musical group)
Publisher: Edmonton, AB : Suspicious Pig, ℗2010.
Edition/Format:   Music CD : CD audio : English
 
Google Books
Killen em in California:
The Men who Killed Steve Allen
By Alan Grano
Lulu Publishing (Lulu.com)
2011
Pg. 27:
Eat a four-day-old pizza and get a terrible case of Pizza-rrhea.
 
Twitter
Lee‏
@leespry
pizzarrhea
The sudden onset of diarrhea by means of the consumption of pizza, be it bad or otherwise
5:35 AM - 1 Mar 2011
 
Twitter
LOC 💢 🐾\\BLFC‏
@LoboLoc0
If you got sick from a pizza joint, would that be called ‘pizzarrhea’?
5:56 PM - 4 May 2013
     
Twitter
Anthony‏
@adheller
Is having the pizza shits called pizzarrhea?
1:48 PM - 15 Oct 2014
 
Twitter
Andy at TANcast‏
@Mysterious_Andy
Pizzarrhea: The consequences of eating month-old pizza.
9:51 PM - 21 Feb 2015
 
Twitter
R.S. Tubbs‏
@Slaughterstubbs
Diarrhea from eating too much pizza is called pizzarrhea
11:36 AM - 19 Jul 2016
 
Twitter
DeadLetterOffice‏
@MilhouseUpdike
Terrible name for a pizza joint: Pizzarrhea.
8:24 PM - 10 Feb 2017
 
Reddit—Jokes
What do you get when you eat bad pizza?
submitted June 2, 2017 by Razzon101
pizzarrhea